Gate-valve.



No. 729,181.- .PATENTBD MAY 26, 1903. s. s. JAGOBSBN. GATE'VA'LVB.

APPLIOATLOKILED JAN. 10, 1,902.

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oooooooooooooooooooooooooooooooooooooooooo c U Nitti-3D STATES PatentedMay 26, 1903.

PATENT v OFFICE.

GATE-VALVE.

` SPECIFICATION forming part of Letters Patent No. 729,181, dated May26, 1903.

Application led January 10, 1902. Serial No. 89,153. (No model.)

T0 all when@ it may concern:

Be it known that I, SOREN SANNE JAcoBsEN, a resident of Bellevue, in thecounty of Allegheny and State of Pennsylvania, have invented a new anduseful Improvement in Gate-Valves; and I do hereby declare the followingto be a full, clear, and exact description thereof.

My invention relates to gate-valves of the type in which the disk iscomposed of two separate halves, and more particularly to such Valves inwhich the disk-halves have bearingfaces engaging each other, so thatthey can adjust themselves to make a tight connectionV with thevalve-seats. This type of valve usually is provided with ways or guidesin the valve-casing and lugs or iianges on the diskhalves which engagetherewith in order to guide the disk in its up and down movements.Should the ways oriianges become worn, there is danger of thedisk-halves falling apart or separating to such an extent as to becomedisengaged from the stem or to otherwise bind or clog in the casing.

The object of my invention is to overcome this difficulty and to providemeans which will prevent the disk-halves from falling away from eachother or separating to such-an eX- tent as to become disengaged from thevalvestem or to otherwise bind or clog in the casing even if theguideways and cooperating flanges or studs become worn excessively or beentirely absent.

To this end my invention comprises, generally stated, a gate-valvehaving its disk formed of two separate halves and interlocking means onsaid disk-halves whereby they are held together and prevented fromseparating or falling apart beyond a certain distance.

In the accompanying drawings, Figure 1 is vform of valve.

The valve-casing 1 may be of any suitable shape and construction and isprovided with the inlet and outlet ports 2 and 3. This casing oppositethe inlet and outlet ports is provided with the valve-seats et, saidvalve-seats being shown as separate brass rings secured to the casing bysuitable screwthreaded joints, although they may, if preferred, beformed integral with the casing. These valveseats are preferablyinclined toward each other, as shown, so as to form a wedge-shapedchambertherebetween, in which chamber the valve-disk is received. Thevalve-disk is formed of two separate halves 5 and 6, having on theirouter faces brass or other suitable rings 7, adapted to contact with thevalveseats 1. Each of these disk-halves is preferably provided with aninwardly-projecting annular flange 8, said flanges being wider at thetop of the disk than atthe bottom, the diminution in size being agradual one. The flange on one of the disk-halves is shown provided witha beveled bearing-face 9 and that on the other disk-half with a curvedbearingface 10, although both of these faces may be curved, if desired.When these two disk-` halves are placed with the anges 8 in engagmentwith Aeach other, they will form a wedgeshaped disk corresponding to thewedgeshaped chamber between the inclined valveseats 4. The flanges 8 arepreferably arranged to be practically opposite or in alinement with thevalve-seats 4, so that said diskhalves cannot become dished or bent bythe pressure. l

The disk-halves are moved by an ordinary valve-stem ll, which passesthrough a stuifing-box in the cover of the Valve-casing and either hasits upper'end screw-threaded to receive a threaded hand-wheel or has thehandwheel splined to its upper end and has its lower end threaded andengaging a suitable threaded socket in or attached to the diskhalves.With the particularA connection of the stem to the disk illustrated itwill be necessary to have the stem threaded at its upper end and engagedby a threaded hand-Wheel; but my invention is not limited to thisconstruction. By the rotation of the hand-Wheel the disk-halvesconnected to the stem are elevated and lowered, thereby opening andclosing the passage through the valve -casing. When the valve islowered, the disk-halves by reason of their curved or inclinedbearingfaces can move upon each other and adjust themselves to thedesired position, so as to form tight connections with the valve-seats.One or both of the disk-halves is provided on its sides with projectingstuds or flanges, such as the flanges 12, shown on one of thedisk-halves, and the valve-casing is provided with theinwardly-projecting ribs or flanges 13, which form betweenv them agroove in which the projections or anges 12 may move in the upward anddownward movement of the Valve, thereby guiding the latter andpreventing the disk-halves from .falling away from each other orseparating to an undue extent. Y

The valve as thus far described is old and is practically the same asthat covered by Letters Patent No. 565,239, granted to W. H. H. Sheets,August 4, 1896, and forms no part of my invention. My invention is animprovementon this and all other forms of gatevalves having a diskcomposed of two separate halves and is designed to prevent the undueseparation of the disk-halves in case the cooperating guides 12 and 13become excessively worn or are entirely absent.

The valve-stem 11 may be secured to the disk-halvesin the manner shownin the abovenamed patent to Sheets, although l prefer to make thisconnection in a slightly-modified form. Eachof the disk-halves 5 and 6is shown provided with a socket or recess 14, which sockets are adaptedto be engaged by lugs or projections 15 on the stem-section 16, securedin any convenient manner to the stem proper,`11-as, for instance, byhaving the latter screw into the upper end thereof. The lugs orprojections 15 are preferably formed with rounded bearing-surfaces, asshown, so that they are, in fact, sections of a sphere, and the socketsor recesses 14 may also be formed with curved or rounded faces, therebypermitting said disk-halves to move freely on the stem to adjustthemselves to the seats 4. Any other well-known means for connecting thestem to a disk composed of two separate halves may be used, if desired.

The means for preventing the disk-halves from falling away from eachother or separating to an undue extent may take various forms, it beingmerely necessary the said means engage both of the disk-halves in such amanner that they can move away from each other only to a limited extent,and preferably the means will be coperating interlocking portions of thetwo halves themselves. The interlocking portions (shown in Figs. 1 to 4)are formed on the projecting flanges 12, although this is not necessary.As illustrated, the disk-half 5 has the projecting flanges 12 formedvery thick and provided with sockets or recesses 18, which do not extendfor the entire length or depth of said flanges, but are limited bybottom walls 19. sockets 18 in the two opposite Iianges 12 are.projected from opposite sides of the said flanges, as shown in Figs. 2and 4. The diskhalf 6 is provided with suitably-shaped lugs 20 to fitinto the recesses or sockets 18. In

The recesses orA assembling said disk-halves the said disks are rstplaced in the position shown in Fig. 4 and then are given a partialrotation in the direction of the arrow 21, thereby carrying the lugs orprojections 2O on the one diskhalf into the sockets or recesses 18 inthe otherdisk-half, whereby said disk-halves are locked together. Theprojections or lugs 2O fit into the sockets or recesses 1S loosely, sothat a certain amount of side movement is permitted, but not sufficientto enable the disk-halves to separate to such an extent that the stemcan become disengaged therefrom. The disk-half 6 has its flange Sprovided with a semicircular recess 22, which engages' the stem-section16, and the latter when the disk is in place prevents rotation of saiddiskhalf, and the other disk-half 5 has its flange 8 cut away, as at 22,so as to permit the diskhalves rotating on each other to a sucientextent' to interlock the lugs or projections 20 with the recesses 18,said disk-half 5 being prevented from rotation when in place by theedges of its flanges 12 bearing against the inner walls of thevalve-casing.

In Fig. 5 the interlocking portions of the` two disk-halves are shown asstuds or projections 23 on one of said disk-halves and coperatinghook-shaped arms 24 on the other disk-half, which hooks take over thestuds or projections 23, and thus lock the two diskhalves together. Thestuds or projections 23 are preferably formed on the annular ange 8; butthis is not essential, as said studs might be formed on the end of armsprojecting out from the disk-half.

The interlocking portions 23 and 24, Fig. 5, are shown as at the uppersides of the diskhalves, although they need not necessarily be locatedat that position. When they are located at the upper side, however, itmay be desirable to provide suitable means for preventing the lowersides from separating to such an extent that the halves will bind orclog in the casing. Any suitable means for this purpose may be used.

In all the forms of my invention, as illustrated and described, thedisk-halves are preferably free to move relatively to each other and onthe valve-stein, so as to seat themselves firmly on the valve-seats.Should the guides 12 and 13 be absent or become unduly worn, thedisk-halves can nevertheless not separate or fall away from each otherto such an extent that the lugs 15 on the valve-stem would escape fromthe sockets or recesses 14 in the disk-halves. As there is no, or verylittle, wear between the interlocking means on the disk-halves, saidinterlocking means will always insure the proper engagement between thestem and disk-halves. It is not necessary that the stem-section 16 be ofa separate piece from the stem 11, as it might be formed integraltherewith. Neither is it essential that the lugs 15 be on the stem andthe sockets 14 in the disk-halves, as these parts may be reversed or besubstantiallysuch IOO IIO

as shown in the patent to Sheets, above rel and radial projections onthe other 'disk-half 35 ferred to, or they may be replaced by anywell-known means for connecting the stern to a disk composed ot'separate halves. Neither are the interlocking means shown limited todisk-halves having bearing-faces engaging each other,.but are equallyapplicable to all gate-valves which have disks composed of two separatehalves.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. A gate-valve having a disk composed of two separate halves, avalve-stem, coperating lugs and sockets on said stem and diskhalves,said disk-halves being provided with a pair of reversely-arrangedsockets or recesses and a pair of lugs or projections adapted to entersaid sockets or recesses and lock the disk-halves together.

2. A gate-valve having adisk composed of two separate halves, avalve-stem, means for securing said disk-halves to said stern one ofsaid disk halves being provided with reversely-arranged sockets orrecesses open at one end, and projections on the other diskhalf adaptedto enter said sockets or recesses and lock the disk-halves together.

3. A gate-valve having a disk composed of two separate halves havingbearing-faces engaging one another, a valve-stem, coperating lugs andsockets on said stern and diskhalves, opposite radial projections on oneof said disk-halves provided with reversely-arranged sockets or recessesopen at one end,

adapted to enter said sockets or recesses, one of said disk-halves beingprovided with a cutaway portion through which the stem passes to permitthe rotation of said disk-halves to lock and unlock the same. l

4. A gate-valve having a casing and valveseats therein, a disk composedof two separate halves, a valve-stem, coperating lugs and sockets onsaid stem and disk-halves, guides formed in the side of thevalve-casing, and cooperating projections on the diskhalves for engagingsaid guides, the projections on one of said disk-halves being formedwith sockets or recesses and the projections on the other disk-halfbeing adapted to enter said sockets or recesses to lock the said halvestogether.

5. A gate-valve having a casing and valveseats therein, a disk composedof two separate halves, a valve-stem, means for securing saiddisk-halves to said stem, coperating guides on the disk-halves andvalve-casing, said disk-halves being provided with a pair ofreversely-arranged sockets or recesses and a pair of lugs or projectionsadapted to enter said sockets or recesses and lock the diskhalvestogether.

In testimony whereof I, the said SOREN SANNE J ACOBSEN, have hereuntoset my hand.

SOREN SANNE JACOBSEN.

Witnesses:

F. W. WINTER, ROBERT C. ToTTEN.

